Question How do you make weapons not clip through geometry with deferred rendering path?

Hello! I'm used to stacking cameras to make weapons not clip through geometry.

im using deferred rendering on 2021 0b14 and when trying to stack cameras... it says `overlay camera cannot be used with deferred rendering`

So my question is: How do i make certain objects render ontop of everything else without camera stacking? (easily) Thank you.!

 

I did in a kind of a non optimal way, but it seems to be working (I'm using BuiltIn RP). The idea is to draw all hand-related meshes first using depth clear shader, which looks like this:

Code (csharp):

1.  
2. Pass
3. {
4.             Name "DEPTH CLEAR"
5.             Tags { "LightMode" = "DepthClear"}
6.             ZWrite On
7.             ZTest Always
8.             //ColorMask 0
9.  
10.             // This allows to work nicely with skyboxes
11.             Stencil
12.             {
13.                 Ref 192
14.                 WriteMask 207
15.                 Comp Always
16.                 Pass Replace
17.                 Fail Keep
18.                 ZFail Keep
19.             }
20.             CGPROGRAM
21.             #pragma vertex vert
22.             #pragma fragment frag
23.             #pragma target 2.0
24.             #include "UnityCG.cginc"
25.    
26.             float4 vert (float4 vertex : POSITION) : SV_POSITION
27.             {
28.                 return UnityObjectToClipPos(vertex);
29.             }
30.    
31.             float frag (float4 clipPos : SV_POSITION) : SV_Depth
32.             {
33.                 #if defined(UNITY_REVERSED_Z)
34.                     return 0;
35.                 #else
36.                     return 1;
37.                 #endif
38.             }
39.             ENDCG
40. }
41.  

Then make a CommandBuffer, set it to CameraEvent.AfterGBuffer. Draw all of your hand geometry with Graphics.DrawRenderer using this depth-clear shader. Then render all geometry again using their default materials, like so:

Code (CSharp):

1.  
2. foreach (var renderer in renderers)
3. {
4.        buffer.DrawRenderer(renderer, m_ClearMaterial, 0, depthClearPassID);
5. }
6.  
7.  foreach (var renderer in renderers)
8.  {
9.      var deferredPassID = renderer.sharedMaterial.FindPass("DEFERRED");
10.       buffer.DrawRenderer(renderer, renderer.sharedMaterial, 0, deferredPassID);
11.  }

Except you also shouldn't turn off original mesh renderers. Otherwise unity won't update animations on them, so you will techically draw these hands 3 times. But since there are not many meshes, it shouldn't be a problem.